Studies on the Resistance of Cultivated and Wild Rice to the Blast Disease : I. Resistance of Seedlings to 4 Races of the Fungus

概要

論文の詳細を見る
(1) In 1957-1959 357 varieties belonging to O. sativa which were collected from various districts of the world, 50 varieties belonging to O. glaberrima and 38 samples belonging to 12 species of wild rice were tested on the leaf-blast resistance by spraying or injecting at the seedling stage spore-suspension of 3 or 4 races of the fungus. (2) As shown in tables 3-6 the tested varieties reacted differently to 3 or 4 races of the fungus. Namely, the majority of Indica type varieties belonging to O. sativa which were introduced from the countries of southeastern Asia and most of the varieties belonging to O. glaberrima showed high resistanc.e to all of the 3 races, while most of Japanese varieties and Japonica type varieties introduced from Taiwan, U. S. A., Philippines and Egypt were susceptible to all of them. (3) A conspicuous difference in the blast resistance was recognized among the samles belonging to each species of wild rice. This indicates that there is no any specific relation betweeh the genome constitution and the blast resistance of wild rice. (4) The facts mentioned above indicate that for breeding highly blast resistant varieties of rice it is of the most importance that the blast resistance genes are introduced from the varieties which are highly resistant to many races of the fungus.
日本育種学会の論文